Aim: This study was carried out to evaluate whether OT Equator Profi le attachment or GPS attachment is less destructive to crestal bone around implants and to bone in distal aspect of the ridge in implant retained mandibular overdenture cases. Materials and Methods: Following two stage surgical protocol twelve completely edentulous patients received two implants placed bilaterally in the canine region (24 implants) to retain mandibular overdentures. Four months following the surgery patients were randomly divided into two equal groups; Group-I received OT Equator Profi le attachment while Group-II received GPS attachment upon which mandibular overdentures were retained. Once patients were comfortable to the prosthesis, they were placed on zero, three, six and twelve months follow-up periods using cone beam computed tomography. Measurements were taken on crestal bone height surrounding the implants and on bone height at distal aspect of the ridge then the results were statistically analyzed. Results: OT Equator Profile attachment showed more crestal bone resorption than the GPS attachment however, there was no statistically significant difference between the two groups in bone resorption of distal aspect of the ridge. Conclusion: GPS is less destructive to crestal bone around implants however, there is no difference between using OT Equator Profile attachment or GPS attachment on bone height at distal aspect of the ridge.
Rizk, Fardos N., "Comparative Study of OT Equator Profile Attachment Versus GPS Attachment in Implant Retained Mandibular Overdenture Cases" (2012). Dentistry. 88.